| 摘要 |
PROBLEM TO BE SOLVED: To perform the maintenance in a transmission case in high workability with a simple procedure comprising the removal of a connection member and a lid case while surely connecting the transmission case to a main frame. SOLUTION: A transmission case 10 composed of a pair of right and left main cases 10A and a lid case 10B detachably attachable to the main case is connected to the front part of a main frame 9 by directly connecting the main case 10A to the main frame 9 in a freely detachable manner and connecting the lid case 10B to the main frame 9 through a connection member 20 in a freely detachable manner.
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